EP 1629455 A1 20060301 - AN IMPROVED DRIVING SCHEME FOR AN ELECTROPHORETIC DISPLAY
Title (en)
AN IMPROVED DRIVING SCHEME FOR AN ELECTROPHORETIC DISPLAY
Title (de)
VERBESSERTES ANSTEUERVERFAHREN FÜR EINE ELEKTROPHORETISCHE ANZEIGE
Title (fr)
SYSTEME D'EXCITATION PERFECTIONNE POUR AFFICHEUR ELECTROPHORETIQUE
Publication
Application
Priority
- IB 2004001700 W 20040517
- US 47320803 P 20030523
Abstract (en)
[origin: WO2004104977A1] A display device (1) has electrophoretic particles (8, 9), a display element including electrodes (5, 6), between which a portion of the electrophoretic particles (8, 9) is present, a temperature sensor (25) and a processor (15) for supplying a driving pulse (32) to the electrodes (5, 6) to bring the display element to a predetermined black, gray or white state, corresponding to the image information to be displayed. For improved grayscale accuracy and optimal picture and text quality, the processor (15) is further arranged to supply pre-pulses (31) preceding the driving pulses (32). The energy of the pre-pulses (31) is increased with increased temperature measured by the temperature sensor (25) and is sufficient to release the electrophoretic particles at a first position near one of the two electrodes (5, 6), but too low to enable the particles to reach a second position near the other electrode (5 or 6).
IPC 1-7
IPC 8 full level
G09G 3/34 (2006.01)
CPC (source: EP KR US)
G09G 3/20 (2013.01 - KR); G09G 3/344 (2013.01 - EP US); G09G 3/38 (2013.01 - KR); G09G 2300/08 (2013.01 - EP US); G09G 2310/06 (2013.01 - EP US); G09G 2310/068 (2013.01 - EP US); G09G 2320/02 (2013.01 - EP US); G09G 2320/041 (2013.01 - EP US)
Citation (search report)
See references of WO 2004104977A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004104977 A1 20041202; CN 100458904 C 20090204; CN 1795485 A 20060628; EP 1629455 A1 20060301; JP 2007501436 A 20070125; JP 4621678 B2 20110126; KR 20060017521 A 20060223; TW 200509020 A 20050301; US 2007052665 A1 20070308; US 7538757 B2 20090526
DOCDB simple family (application)
IB 2004001700 W 20040517; CN 200480014064 A 20040517; EP 04733406 A 20040517; JP 2006530684 A 20040517; KR 20057022418 A 20051123; TW 93114267 A 20040520; US 55768304 A 20040517